Geomagnetic secular variation and the statistics of palaeomagnetic directions
Citations
566 citations
Cites background or methods from "Geomagnetic secular variation and t..."
...This filtering procedure is commonly used by the geomagnetic field community (10, 11)....
[...]
...The onset of this last phase of India–Asia collision is contemporaneous with a period of outward growth and extension of the Tibetan plateau (10, 12, 48)....
[...]
393 citations
Cites background from "Geomagnetic secular variation and t..."
...several hundreds of kilometers in paleolatitude), following clear quality criteria [23]....
[...]
286 citations
[...]
175 citations
Cites background or methods from "Geomagnetic secular variation and t..."
...It has long been recognized (e.g. Creer, 1962; Cox, 1970) and later re-emphasized (e.g. Tauxe et al., 2008, Tauxe et al., 2010; Deenen et al., 2011) that the scatter of directional data induced by paleo-secular variation becomes increasingly N–...
[...]
...Creer, 1962; Cox, 1970) and later re-emphasized (e.g. Tauxe et al., 2008, Tauxe et al., 2010; Deenen et al., 2011) that the scatter of directional data induced by paleo-secular variation becomes increasingly N–S elongated with lower latitudes....
[...]
...In particular, the behavior of the magnetic field known as paleo-secular variation, but also measurement uncertainties, induce scatter in paleomagnetic data (e.g., Butler, 1992; Johnson et al., 2008, Biggin et al., 2008, Tauxe et al., 2010, Deenen et al., 2011)....
[...]
...Since the actual data in paleomagnetic research are seldom published or included in databases, and commonly only site mean directions are given, most published sedimentary paleomagnetic data include statistical parameters of direction distributions (α95, k) that are unrepresentative of the dataset (Deenen et al., 2011)....
[...]
...…in paleomagnetic research are seldom published or included in databases, and commonly only site mean directions are given, most published sedimentary paleomagnetic data include statistical parameters of direction distributions (α95, k) that are unrepresentative of the dataset (Deenen et al., 2011)....
[...]
160 citations
Cites background or methods or result from "Geomagnetic secular variation and t..."
...We evaluate the likelihood that a mean lava-based VGP represents the time-averaged geomagnetic fi eld following Deenen et al. (2011)....
[...]
...The likelihood that a sedimentary paleomagnetic data set represents a time-averaged geomagnetic fi eld direction can be evaluated with reasonable assumptions about geomagnetic fi eld behavior (Deenen et al., 2011)....
[...]
...This can be straightforwardly explained by some averaging of secular variation within individual specimens, which is common in sediments and especially redbeds (Deenen et al., 2011)....
[...]
...…from the site mean directions for most of the individual studies is either greater or smaller than can be straightforwardly explained by the secular variation of the geomagnetic fi eld (e.g., Johnson et al., 2008) and the A95values plot outside of the Deenen envelope (Deenen et al., 2011)....
[...]
...…that the calculated dispersion of this fi ltered mean VGP is consistent with known dispersion caused by paleo secular variation (Johnson et al., 2008), the A95 is within the confi - dence envelope of Deenen et al. (2011), and the pole fulfi lls all seven quality criteria of van der Voo (1990)....
[...]
References
5,482 citations
"Geomagnetic secular variation and t..." refers background or methods in this paper
...It is common practice to average palaeomagnetic directions using Fisher (1953) statistics; the corresponding VGPs may also be averaged in the same way but this is less commonly done....
[...]
...…of the constructed pole; ϕ = longitude of the constructed pole; α95 = published 95 per cent confidence limits determined on directions; k = published Fisher (1953) precision parameter determined on directions, A95 = 95 per cent confidence limit on the pole, calculated by multiplying α95 by 1.1…...
[...]
...It produces Fisher (1953) distributed sets of VGPs that average to the spin axis and hence supports the GAD assumption....
[...]
...A first milestone paper concerned dispersion of palaeomagnetic vectors on a sphere (Fisher 1953), which enabled palaeomagnetists to determine a statistical mean of a number (N) of directions or poles with an associated dispersion (or precision) parameter (κ , estimated by k or K for directions and…...
[...]
2,899 citations
"Geomagnetic secular variation and t..." refers background in this paper
...In addition, Europe has undergone little palaeolatitudinal motion since the Eocene, within only a few degrees (Torsvik et al. 2008)....
[...]
...Finally, there is good control on the age and timing of the accretion of blocks to Europe (Sengör & Yilmaz 1981; van Hinsbergen et al. 2005a), which allows us to select only data from those blocks that were already accreted to Eurasia at the timing the sampled sediments were deposited....
[...]
1,283 citations
"Geomagnetic secular variation and t..." refers background in this paper
...Additional tests have been developed to test whether palaeomagnetic data set share a common mean, such as the reversal test (e.g. McFadden & McElhinny 1990) or, more generally, a common true mean direction (CTMD) test....
[...]
1,144 citations
"Geomagnetic secular variation and t..." refers methods in this paper
...We obtained VGP data sets by randomly drawing 10 000 VGPs from a Fisher distribution at the pole (Fisher et al. 1987) with κ values 12.5, 25 and 50....
[...]
933 citations